package com.facebook.common.references;

import com.facebook.common.internal.VisibleForTesting;
import java.util.IdentityHashMap;

@VisibleForTesting public final class SharedReference {
    public class NullReferenceException extends RuntimeException {
        public NullReferenceException() {
            super("Null shared reference");
        }
    }

    static {
        new IdentityHashMap();
    }
}

